Basis of presentation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification [Line items]
Equipment expenses	$ 9,561	$ 8,674	$ 17,973	$ 17,063
Professional fees	50,132	38,430	83,563	75,222
Technology and software expenses	72,354	74,761	140,913	145,296
Processing and transactional services	36,801	31,037	70,710	61,990
Communications	4,175	3,497	8,263	7,170
Other operating expenses	$ 22,852	18,292	$ 47,213	42,222
Net effect on operating expenses		174,691		348,963
As Reported
Reclassification [Line items]
Equipment expenses		25,088		48,567
Professional fees		114,872		223,369
Technology and software expenses		0		0
Processing and transactional services		0		0
Communications		5,993		12,140
Other operating expenses		28,738		64,887
Net effect on operating expenses		174,691		348,963
Adjustments
Reclassification [Line items]
Equipment expenses		(16,414)		(31,504)
Professional fees		(76,442)		(148,147)
Technology and software expenses		74,761		145,296
Processing and transactional services		31,037		61,990
Communications		(2,496)		(4,970)
Other operating expenses		(10,446)		(22,665)
Net effect on operating expenses		$ 0		$ 0